/Engine/Source/Runtime/MovieScene/Public/Evaluation/PreAnimatedState/MovieScenePreAnimatedStateStorage.h
Attempt to find a storage index for the specified key
[FPreAnimatedStorageIndex](API\Runtime\MovieScene\Evaluation\PreAnimatedState\FPreAnimatedStorageIndex) FindStorageIndex ( const [KeyType](API\Runtime\MovieScene\Evaluation\PreAnimatedState\TPreAnimatedStateStorage\KeyType) & InKey ) const